Germanene as potential material for sensor of toxic gases CO2, SO2, and CH4: A DFT study

"Germanene as potential material for sensor of toxic gases CO2, SO2, and CH4: A DFT study" show that gases of CO2, SO2, and CH4 are physically adsorbed on germanene via a charge transfer mechanism. The physisorption of these gas molecules on germanene opens a band gap at the Dirac point of germanene. The different adsorption behaviors of gas molecules on germanene provide a feasible way to extend germanene for gas sensors.